John keidel



(No Model.)

: J. KEIDEL. STEAM TRAP.

No. 308,676. Patented Dec. 2, 1884.

f v f 1 l WITNESSES; WL INVENTOB rrn STATES PATENT Ornicn.

JOHN KEIDEL, OF BERLIN, GERMANY.'

SPECIFICATION forming part of Letters Patent No. 308,676, dated December 2, 1884.

' Application filed July 10, 1884. (No model.) Patented in France December 6, 1883, No. 159,007,- in Germany December 14, 1883,

207,269, and in England January 29, 1884, No. 995.

To a ZZ whom, it may concern:

Be it known that I, JOHN KEIDEL, of Berlin, in the Empire of Germany, have invented certain new and useful Improvementsin Steam- Traps, (and which has been patented to me in France under date of December 6, 1883, No. 159,007, in Germany under date of December 14, 1883, No. 207,269, and in England under date of January 29, 1884, No. 995,) of which the following is a specification.

This invention has reference to improvements in steam-traps or apparatus for collecting the condense-water from steam in pipes and other conduits and vessels; and theinvention consists of an exterior tube having a screwplug and a valve -seat at the upper end, a steam-inlet pipe passing through said plug through the exterior tube, and an expansionpipe that is attached toan adjustable plug at the bottom of the exterior tube, and made of such a length that by its contraction and expansion it forms a valve with saidvalveseat, so as to discharge intermittently the water of condensation collected in. the trap.

The accompanying drawing represents a vertical central section of my improved trap for collecting the condense -water from steampipes and other conduits.

a in the drawing represents a tubular iron pipe, which is provided at its upper end with a screw-plug, a, having valve-seat a". The valve-seat a is arranged at the lower end of the screw-plug a. Through the pipe extends a steam-inlet pipe, I), which I call the dip-pipe, through which the steam is conducted to the interior of the trap. The dippipe 1) extends centrally through the exterior tube until within a short distance from the bottom of the tube a, which is closed by a hollow screwplug, d, havinga detachable screw-stopper, d

To the inner end of the bottom screw-plug d is securely attached an expansion pipe, 6, that is of greater diameter than the dip-pipe, and which extends in the'space between the tube a and inlet-pipe b in upward direction, it being guided along guides of the screw-plug a below the valve-seat a The exterior tube (6 is provided with one or ,more lateral wateroutlets, f f, at one or both ends. The steam,

contracted because of the lowering of the temperature, so that it recedes from the valveseat c and admits the escape of the condensewater into the space between the expansionpipe e and the exterior tube, a. By means of the adjustable bottom plug, (1, the proper position of the expansionpipe relatively to its valve-seat a can be regulated as required for the different temperatures of the steam.

In steam-traps of this class heretofore in use no dip-pipe was employed, so that the steam or condense -water entered directly into the expansion-pipe, which has the disadvantage that the steam overtakes the condense-water in the expansion-pipe, and causes the forcing back of the water and steam from the trap into the steam-conduits, whereby the proper regulation of the trap for the difference of temperatures of the steam and water and the reliable working of the apparatus is prevented. By the employment of the dip-pipe inside of the expansion-pipe the forcing back of the water of condensation into the conduit is prevented, as the water is retained in the annular space between the dip-pipe and the expansion-pipe valve-seat, so as to bear on the valve-seat or recede therefrom by the difference of temperature in the trap, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two witnesses.

JOHN KEIDEL.

Vitnesses:

CHAPMAN COLEMAN, CHARLES 0. MORE. 

